Cabling

I need some cabling support, specifically: I need to run a series of cables through a conduit. I use the route network first, then the route cables. To have them side by side, I copy the network of the first one, at least for the straight segment. What I need is if there's a way, when I route cables, that my cables must fit inside my conduit, so I can set some clearances. If there are a lot of cables and they don't fit within the clearances, please let me know. Basically, I need the same thing you use for the holes; that is, I set the maximum clearance diameter through which certain cables can pass, but instead of circular areas, I need rectangular areas since they're conduits.

Thanks in advance.